|   XT Disc hubs - LBS opinion | singletrack
Jan 23, 2003 8:53 AM | | Last night I was on a night ride with some of the LBS boys. I casually mentioned I was going to convert my hardtail from XTR rim brakes to Avids Mech. I have a disc wheelset I purchased off a buddy who moved to Las Vegas. The Wheelset is Mavic 317 with XT Disc hubs. They all started scoffing about the weight of XT Discs and said I might as well tie a brick to my bike.
My question, are they really that heavy? |
| No, and the new ones got lighter... | næstep
Jan 23, 2003 8:58 AM | | I don't have the model numbers or weights in front of me, but the newer XT disc hubs made some weight improvements over the previous generaton. I built some front wheels up using these earlier this summer, and while the weights were heavier than, say, Hope or Real or King, is wasn't enough of a penalty to ignore their attractive price or known reliability.
The actual weight values are easy enough to compare on Shimano's or maybe Cambria's site.
næstep |
| Disc are Heavier | Pitbull
Jan 23, 2003 10:24 AM | | Regardless of what disc set up you go with there is going to be a weight penalty. With the XT set up the rear hub alone weighs in at a pound, this plus the weight of the discs and brake assembly it is hard to get away from the fact it will be heavier. If cost is no object, King, Hugi, Real, and 03 xtr will make for lighter over all wheel sets.
It sounds like the LBS boys would be classified as "weight weenies." The weight differences will be close to a pound in just the wheels, if my estimations are correct. If you are a heavier rider Discs maybe perfect for you. I being over 200 pounds ride a 28 pound FS with discs and also ride a 25.5 pound hardtail both with clysdale wheels. The extra weight doesn't bother me as bad a 130 pound "weight weenie" The decision is your's and your's alone. If it works for you do it! The discs are "Better" brakes! |
| Opinions aren't worth the paper they're written on... | JimC.
Jan 23, 2003 10:48 AM | | but facts are: thanks to Mike T here...
http://www.execulink.com/~dtierney/wmc/Magura/weight_weenie.htm
Maybe few grams +, but hey, when it gets wet, you'll smoke 'em. And you'll always be in control, they won't. Tell 'em to weigh that.
Jim MCM #11 |
| I have the weights of the FH-M755 at 552g and the HB-M755 | Sproket the Rocket
Jan 23, 2003 1:35 PM | | at 354g from my order catalog from last year. Take that as you will but....thems the numbers!
Chris |
| 755? Them's the old numbers! | næstep
Jan 23, 2003 1:48 PM | | Newer 756 is listed at 244g (F) and 435g (R) (+QR).
næstep |
| 755? Them's the old numbers! | wrench science admin
Jan 23, 2003 4:32 PM | | To answer the first question about weight, not being a weight weenie, Xt are quite a bit heavier than other disc hubs, not to say you shouldn't use them, but for example a king iso hubset, which is one of the lightest, would run about 200g less than the xt set, but also cost about 4x more. |
| At what price a gram, Graham? | næstep
Jan 23, 2003 5:50 PM | | Come on, you're going to compare a $275 King ISO (306g) to a $40 Shimano 756 (435g)? That's almost 7 times more expensive. Is that worth $235 to save 129g?
Same with the front: $125/166g vs. $30/244g = 4x / +$95 / -78g
All told, that's $330 to save 207g (.45 lbs.), or about $1.60 per gram saved.
I know, I know in the end, it is up to the buyer to decide worth, but XT vs. King ISO is hardly a fair comparison.
Weight-wise, the 756 XT's are on par with other disc hubs in their price range. That is a fair comparison.
næstep |
| Some actuals | NCN
Jan 23, 2003 6:51 PM | | Before a recent build I weighed the 756s at 245g front and 434g rear, with the QRs at 60g and 65g respectively. Hugi 240 Discs from another recent build weighed 167g and 270g. Fair difference in weight, but a HUGE difference in price.
NCN |
| damn right thems the old numbers......that's what I said! nm | Sproket the Rocket
Jan 23, 2003 9:05 PM | | |
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